Guided digital anti-interception and anti-jamming device and method

Abstract

The invention discloses a guided digital anti-interception and anti-jamming device and method, comprising an orthogonal receiving module, an air domain cancellation module, a spread spectrum code synchronization module, a time domain cancellation module, a reference signal extraction module and an orthogonal transmission module; Extract the pilot signal as a reference signal at the receiving end, use the matrix inversion method to periodically update the spatial domain combining weights, and accurately nullify the interference on the pattern of the receiving antenna of the communication station without knowing the interference and signal direction , to suppress all kinds of strong external interference; using time-domain cancellation technology, the output signal of the reference extraction module is used as a reference signal to further suppress the residual strong external interference and the spreading code signal introduced by the transmitter, and restore the useful signal to the receiver; Complete two-level interference cancellation, small insertion loss, large dynamic range, fast cancellation speed, strong promotion of interference suppression algorithm, two-level reference cancellation also ensures communication quality, and good real-time signal processing.

Description

technical field [0001] The invention belongs to the technical field of communication anti-interference, and in particular relates to a guided digital anti-interception and anti-interference device and method. Background technique [0002] Interference and anti-jamming technology are mutually reinforcing and mutually restraining, and they continue to develop. The research, development and application of communication anti-jamming technology have attracted more and more attention. However, communication stations are often faced with harsh operating environments and are susceptible to various intentional or unintentional interferences, especially strong interferences facing countermeasures, so they cannot work normally. The weight-merging interference cancellation technology is an important technical means to solve the problem of radio frequency interference. The principle is to adjust the gain of multi-antenna received signals and combine them to complete the elimination of i...

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Problems solved by technology

[0004] A Chinese patent for a multi-channel interference cancellation device (application number 201518001239.6), an adaptive interference cancellation device and its debugging method (application number 201110223502.7) all belong to the analog domain interference cancellation scheme, and the Chinese patent digital-analog hybrid automatic Adaptive interference cancellation device (application number 201811155137.9) and other hybrid interference cancellation schemes belonging to the analog domain and digital domain cannot overcome the problems of analog domain cancellation such as implementation complexity, insertion loss, adaptive adjustment and cancellation speed, Chinese patent digital The radio frequency cancellation device and method for domain interference reconstruction (patent number 201811155774.6) belongs to the digital domain interference cancellation scheme, but there is a delay in processing signals and the real-time performance is poor

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